Quote:
Originally Posted by cmargosi
Is there anyone out there that has put this tune on their M550? The local speedshop I trust says it's good for 85hp and undetectable by the service departments.
I don't doubt the 85hp. Wonder about the lack of detectability?
Anyone done it?
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i think consensus is anytime you take it in, you should revert back to stock flash, but if bmw looks deep enough in case of a catastrophic failure, they can find out that the car was tuned.